openjudge-NOI 2.6-2728 摘花生
题目链接:http://noi.openjudge.cn/ch0206/2728/
题解:
某一个点只能从其左边或者上边走过来
f[i][j]存储(i,j)这个点上的结果,即f[i][j]=max(f[i-1][j],f[i][j-1])+a[i][j]
1 #include<cstdio> 2 #include<cstring> 3 #include<algorithm> 4 using namespace std; 5 #define N 110 6 int a[N][N],f[N][N],n,m; 7 int main() 8 { 9 int t; 10 scanf("%d",&t); 11 while(t--) 12 { 13 memset(f,0,sizeof(f)); 14 scanf("%d%d",&n,&m); 15 for(int i=1;i<=n;i++) 16 { 17 for(int j=1;j<=m;j++) 18 { 19 scanf("%d",&a[i][j]); 20 } 21 } 22 for(int i=1;i<=n;i++) 23 { 24 for(int j=1;j<=m;j++) 25 { 26 if(i==1)f[i][j]=f[i][j-1]+a[i][j]; 27 else if(j==1)f[i][j]=f[i-1][j]+a[i][j]; 28 else f[i][j]=max(f[i-1][j],f[i][j-1])+a[i][j]; 29 } 30 } 31 printf("%d\n",f[n][m]); 32 } 33 return 0; 34 }